Plunger pump



July 18, 1933.

c. LAKIN-SMITH PLUNGER PUMP 2 Sheets-Sheet 2 Filed Jan. 3, 1930 Patented July, 1s,. 1933 j CLIFFORD Luis-SMITH, onwnscrmmsrnn,Lonnon," n1mLA1 rn P nNGEa our 'n iication med January 3, 1930; Serial no, 418,273, main Great nntaiiriana 'r e,i929.I f

This invention relates to pumps of the I i type in which the axis of apalrof oppositely disposed pistons or plungers s arranged transversely to the axis 5 pump, the effective reciprocation of the p stons or plungers being obtain'edby a crank,

- oraneccentric pinarranged in a guide arrangedat rightyangles to the piston. or

plungers. Thel objectof the -invention is to increasethe eff ciency of such pumps Without increasing their size, and without providing additional cylindrical pistons or. plungers.

The present nvention consistsi'of a piston m or r plunger pump ofthe kindin which the.

i6 plunger orpiston rod has a transverseguide or slot in which operates a crank or eccentr c pin, wherein the liquid displacement ofthe pump is increased by the crank or eccentr c epin or ablock carried thereon operating n 26 thetransverse guide or-slot ofthe plston rod or plunger to drawduring the operation of the piston or plunger pumpliquid intothe guide or slot and .thendisplace it through one or more"portsyprovided inadditionto for the main piston or 28 those. provided plunger.

The invention further? comprises a er pump having rigidlyconnected opposlte ly disposed plungers between which i V is pro so vided a transverse guide having. a slot m which operates acrank or eccentric enclosed in a casing provided with inlet and outlet j fluid passages, wherein the crank pin or ece centricduring itsrelativenrovement in the slot of the transverse guide draws fluid into the slot through a portfat one end "of the guide and during afurther stage of the operation displacesfthe fluid through the same 7 port and through the outlet ofl the' casing. If) Theinvention is equally'applicablextoa.

V pump of the kind inwhich a rotary carrier containing radial cylinders rotates around a ,pin arranged eccentrically to effect the reciprocation of the piston or plungers relatively to the .cylinders,'as to a pump in which the radial eylindersare fixed and the pistons or plungers are ireciprocated by a rotating crank.' i l manner of carrying out the invention is V lllustrated by the accompanying drawings of rotation of the,

.' The dimensions of sage 4a and verse section offthe plungers through AA l of Figures land r In these drawings 01 and-c2] are two oppositelyyldisposed; cylinders bored diametrically in a rotor;forinedi' offtwo portions 2a d and% by aplane at right angles to its axis,

the'two portions being detachablyconneeted together *by bolts passed through holes 28; In the cylinders'al and 'c2reciprooate an in:

tegral pair of coaxial plu'ngers 500,511, the mid V r I portionfof the plungers being shaped to yfor m a transverse guidej 5g having a slot which reciprocates Va bloek 6 rotatively mounted'on a fixed orj adjustable eceentricpin {The q ends F56 and 5} of the transverse guid'efig'lare w;

arranged'to slideon oppositely disposedp-ar- 7 allelsurfaces 20 and Qd'p'iovided injthe rotor Y" i 2a, 2?), parallel to'theja-xis of-the cylinders j a f 01, 02. The surfaces 2632;? are provided with intermediate ports oropenings2ey2f respec-' '7 tively, 'arranged'he'tween the cylinders 01 and V 02 which extend to the periphery of the rot-or 26,26 so'ithat they will rotate over inlet and 7 outletpassages 4a and 4b providedin the cas-1v ing of, the pump. The" periphery of the ro- 86.31 .tor'is arrangedlto move over concave {por 4 tions 'o'fthe easing on shoes lc andkial provided in the casing Lbetwe'e'n the'inlet and out let passages 4a and 4b, 1"

mentelements will be the same.

the .cornesponding'adjaoent port 2e 01 127 df" the rotor2ay2b andwith walls 5cfrom-which' the pistons 5'ajtand'5beiitend, j. p u I The rotor 2a, 25 issmngu inlth'e usual manner "infthe cylindrical easing 4; which is provided with the inlet- 4:9 leading toithe'pas an outlet 4] leading from, i

the outerends of the 5 ports 2e and2f at theperiphery of the rotor Y M 26" are preferably made to agree with those, 7 of'the'iopnendsof thecylinders 01 and 02 '50- 3 that -the timing relationoffall the'displace The ends'5e and 5f fithej'transverse guide i"; 5g ,con'nectin'gthe plungers 'dand 5b are each providedwithja port'5dregisteringwith 1 9 sages formed by grooves or recesses 5m H or double ended passage ib. The casing 4 is provided with one removable end 46 in which is'supported the eccentric pin 3 by anut 3a, and which has an inwardly extending boss 42' forming a bearing for a boss 2i extending from the portion 2:; of the rotor. The opposite side or end of the casing hasa bearing. faceagainst which rotates the other portion of the T0- tor, the portion 26 of the rotor is also providedwith a shaft 2j which is the driving shaft of the ump and which passes through a glandk.

In pumps of this type it is necessary to pro vide some clearancebetween theprojecting portions of the transverse guide 5g and the inner cavities 2m, 21;, of'therotor, asfin the present construction liquid may leak into such cavities or clearance spaces, and in order tobalance the pressure between the cavities 2m and 2% they are connected by pasformed in the transverse guide 5g.

The device may be duplicated on the same shaft, the pistons of one section being'arranged at right angles to those of the next section.- .EWhen'such duplication is effected communication between the sections may be prevented by means of discs arranged-between the gulde members of each unit;

0 ,These discs may be so arranged that their outer'peripherles bear on the inner surfaces of the'carrier ring while they have a hole arranged eccentrically in them to fit over the eccentric pin. In such modifications the inlet-s and outlets may be coupled in any desired manner such as'for instance to give a parallel effect ora series or compound effect.

The invention is. also applicable to; each pair of oppositely disposed cylinders of pumps having morethan one pair of integral plungers rotating inthe same plane. I l

What I claim and desire to ters Patent is p 1. A pump comprising in combination two coaxial and oppositely disposed cylindrical secure Let- 'plung'ers,'a transverse rectangular guidevway arranged between and connecting the two oppositely disposed 1plungers and forming liquid displacement c ambers transverse- 1y to the plunge/rs, a rotor having diametri' on whlch slide the outer ends of the guide-way cally opposed cylinders in which the plung;-

ers arereciprocated by therectangular guideway, parallel flat surfaces provided in the rotor parallel to the axis'ofthe plungers and and supporting the plungers independently I of the cylinders, the outer ends of the guideway being constructed as shoulders on the t plungers and the insideof the rotor and grooves formed in the shoulders placing'the opposite cavities in communication witheach other, the rotor being also provided with in} termediate ports diametrically arranged at right angles'to the cylinders and passing through flat parallel surfaces, a pump casing bored to receive therotor and having a liquid inlet and a liquid outlet separatedby shoes projecting into the casing and forming a portion of the bored surface of the casing in which the rotor rotates, means whereby the rotor can be rotated, afixed pin secured eccentrically in thecasing and extending into the'guide-way, a block rotatable on said pin and adapted to slide in the guide-way,'ports being provided in the opposite ends of the guide-Way and opening into the intermediate ports provided in the rotor so that during the rotation of the rotor, liquid will be drawn lindrical plungers, a transverse rectangular guide-way arranged between and connect ng the two oppositely disposed plungers and forming. liquid displacement chambers transversely to the plungers, a rotor havlng (113,:

metrically disposed cylinders in which'the plungers are reeiprocated by the rectangucomprisingin combination two coaxial and oppositely d1sposed:cy-

ed in the rotorparallel'tothe axis of {the 'plungers and on which slide the outer ends ofthe guide-way and supporting the plungers independently of the cylinders, the-outer shoulders on the plungers and the inside of the rotor and grooves formed in the shoul ders-placingthe opposite cavities in communi cation-with each other, the rotor being also provided with intermediate ports diametrically arranged at right angles to the cylinders and passing through the 'flat'parallel sur faces, apumpcasing having a chamber to s receive the rotor and having a liquid inlet and a liquid outlet separated by oppositely l;

disposed walls which project into the casing and formaportionof the surface of the said chamber in which the rotor rotates,,mea ns whereby the rotor Y can I be rotated, the

ports being providedin'the opposite ends of the guide-way and opening into the intermediate ports provided in the rotorso that during the rotation of the rotor, liquid will bedrawn by the rectangular reciprocating block into one end of theguideway while the port communicating therewith passes the in let of the pump and will be, driven through v the same end of the guide-way whilethe port 'lar' guide-way, 'parallel'flat surfaces provid-- '9 ends of the guide-way being constructed as 9 adapted to reciprocate in the guide-way, v

P: AL

communicating therewith passes the outlet of the pump.

3. A pump comprising in combination two' coaxial and oppositely disposed cylindrical plungers, a transverse rectangular guide-way arranged betvveenand connecting the two oppositely disposed plungers and forming liquid displacement chamberstransversely to the plungers, atWo-piece rotor having diametrically opposed cylinders in vvhich the plungers are reciprocated by the rectangular guide-way,'parallel flat surfaces providedin the rotor parallel to the axis of the plungers and on which slide the outer ends ofthev guide-Way and supporting the plungers independently of the cylinders, the outer ends of the guidewvay being constructed as shoulders on the plungers andthe inside of the rotor and grooves formed in the shoulders placing 3 the opposite cavities in communication with each other, the rotor being formed of two pieces secured together and divided trans versely to its axis and the axes ofthe cylin} ders, the said rotor being also providedwith intermed-iateports diametrically arranged at right'angles to the cylinders" and passing through the flat parallel surfaces, a pump cas- Y way and opening into the" intermediate ports provided in the rotor sothat during the rota 1 tion of, the rotor, liquid will be, drawn intoone end of the" guide-way'whilethe port com-"f lnunic 'atingtherewith-passes theinlet of they pump and;wi11b driven. through the same fendof guideay Whiletheport: communic'ating therewith passesthe outlet of the .f CLIFFORD LAK N sM ITH; 

